针对已被移除的路由规则功能的。根据 botmgr.py:74-100 中的注释，路由规则已被移除，Bot 现在直接绑定到 Pipeline 或 Workflow。

src/langbot/pkg/api/http/service/workflow.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 import asyncio
 import uuid
 from datetime import datetime, timedelta
-from typing import Any, Optional
+from typing import Optional
 
 import sqlalchemy
 

src/langbot/pkg/persistence/migrations/dbm026_workflow_tables.py

@@ -119,7 +119,7 @@ class DBMigrateWorkflowTables(migration.DBMigration):
         # Update bots table: add binding_type column (default to 'pipeline' for backward compatibility)
         # Check if column exists first (SQLite doesn't support IF NOT EXISTS for columns)
         try:
-            result = await self.ap.persistence_mgr.execute_async(
+            await self.ap.persistence_mgr.execute_async(
                 sqlalchemy.text("SELECT binding_type FROM bots LIMIT 1")
             )
         except Exception:

src/langbot/pkg/workflow/executor.py

@@ -1136,7 +1136,7 @@ class DebugWorkflowExecutor(WorkflowExecutor):
         node_state.inputs = inputs
         debug_state.add_log(
             'debug',
-            f'Node inputs resolved',
+            'Node inputs resolved',
             node_id=node.id,
             data={'inputs': self._safe_serialize(inputs)}
         )
@@ -1223,9 +1223,6 @@ class DebugWorkflowExecutor(WorkflowExecutor):
             return {'completed': True}
         
         # Execute single node
-        node_map = {node.id: node for node in workflow.nodes}
-        edge_map = self._build_edge_map(workflow.edges)
-        
         debug_state.current_node_id = next_node.id
         await self._execute_debug_node(next_node, context, debug_state, workflow.settings.max_retries)